High efficient and energy saving motor driven down the hole drill Single top, double top, bearing type ... geological features.High efficient and energy saving motor driven down the hole drill Specifications ItemModelKQD100Unit 1Hole Diameter80~130mm2Economical Drilling Depth ... ≥6M³/min6Drilling Rod60*1000mm7Lifting ability9.6KN8Remarkmotor driven motor driven down the hole drill series KQD100